The early butterfly season turns Cuc Phuong into a living wonderland.

Butterflies have already filled Cuc Phuong National Park after arriving three weeks early, drawing crowds of visitors even on weekdays.

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In early April, Cuc Phuong National Park in Ninh Bình Province bursts into life as millions of butterflies in dazzling colours blanket forest trails and tree canopies, creating a rare and vibrant spectacle. Cuc Phuong is home to over 400 species of butterflies. During the season, large numbers gather near the main park entrance, giving visitors the chance to observe a wide variety of shapes, sizes and colours at close range. The unusually early and dense appearance of butterflies is seen as an indicator of a healthy forest ecosystem with minimal human impact.

This year, the season has arrived two to three weeks earlier than usual, coinciding with the start of the tourism season and drawing a surge of visitors eager to witness the extraordinary display.

According to the Centre for Environmental Education and Services, favourable weather conditions – particularly sunny days following rainfall – have provided a perfect environment for butterflies to thrive and gather in large flocks.

Along the trails, clusters of white, yellow and orange butterflies’ shimmer in the sunlight, covering damp patches of earth or hovering by streams.

At the slightest disturbance, thousands take flight, producing a scene both enchanting and dynamic. For photographers, this season is considered a golden opportunity to capture striking images of nature.

The spectacle does not end with daylight. At night, millions of fireflies illuminate the forest canopy, transforming Cúc Phương into a shimmering miniature universe.

Recognising the early arrival of this natural phenomenon, the National Park Management Board quickly adjusted its annual plans, launching experiential tours ahead of schedule to serve visitors.

Among the most popular offerings are the daytime butterfly-watching tour and the nighttime firefly experience.

During the day, travellers follow winding trails where butterflies flutter like living confetti. Guides enrich the journey by explaining the butterfly’s life cycle, its role in pollination and the delicate relationship between insects and the forest ecosystem. For the best experience, visitors from Hanoi should leave by 5 a.m. to reach the park by 7:30 a.m. and avoid the crowds. Butterflies are easier to photograph before the sun gets too hot since they tend to shelter in the shade as temperatures rise.

April also is a good time to see fireflies at night. Firefly tours run from 7 p.m. to 8 p.m. At night, guests move through the stillness of the forest, listening to natural sounds while thousands of glowing lights flicker like a terrestrial galaxy.

Visitors can stay overnight at Cong Rung Hotel at the park entrance, where rooms cost between VND500,000 and VND800,000 ($19 to $30). Bookings can be made at the park’s front desk.

For a day trip, the best plan is to arrive early and leave around 2 – 3 p.m. Entry tickets cost VND60,000 ($2.30) per person, and parking ranges from VND20,000 to VND30,000 (80 cents to $1.15).

However, tours are strictly regulated in terms of visitor numbers, timing and designated routes. Guests are advised not to use bright lights, capture insects or create excessive noise, ensuring minimal impact on these delicate habitats.

Before or after the butterfly season, visitors to Cúc Phương can enjoy a wealth of ecologically friendly activities: trekking through ancient forests, exploring rich biodiversity, visiting the thousand-year-old chò tree, or discovering prehistoric caves.

This blend of striking landscapes and diverse experiences is helping Cúc Phương emerge as one of northern Việt Nam’s standout destinations in early summer.

Experts note that the butterfly season typically lasts from late March until the end of April, depending on weather conditions. Visitors are encouraged to come in the morning or early afternoon, when butterfly activity peaks, while maintaining environmental awareness to minimise impact on the ecosystem.

With pristine beauty and shimmering displays across the ancient forest, this year’s early butterfly season is both a fascinating natural phenomenon and a powerful symbol of green and sustainable tourism.

It highlights Ninh Bình’s commitment to eco-friendly travel and strengthens its image as a destination where nature, culture and responsibility converge.

Sources: Collected.

Photos: Collected.